Portable storage unit



FIG. 1 is a front perspective view of the portable storage unit as shownin FIG. 1;

FIG. 2 is a front view of the portable storage unit as shown in FIG. 1;

FIG. 3 is a rear view of the portable storage unit as shown in FIG. 1;

FIG. 4 is a left side view of the portable storage unit as shown in FIG.1;

FIG. 5 is a right side view of the portable storage unit as shown inFIG. 1;

FIG. 6 is a top view of the portable storage unit as shown in FIG. 1;and,

FIG. 7 is a bottom view of the portable storage unit as shown in FIG. 1.

CLAIM The ornamental design for a portable storage unit, as shown anddescribed.